[Collins] Re: [Johnson] Re: Advantages/disadvantages of an "L" tuner circuit?

Thu, 14 Nov 2002 20:27:02 -0800

Gents - The L network is the most efficient and shows lower voltages across
components.  Viz the Coillins 180S
tuner.  The Ten Tec tuner is a good circuit and probably the most efficient
one for sale to hams today.  The Palstar
is the most heavy duty available uses a T network.  Check the antenna
matching program on the CD with latest edition
of the ARRL handbook.  I've built dozens of tuners and my favorite is a T
net using vacuum variables and a Johnson roller coil.  It will match
anything from 160 -10 meters!  The Nye Viking is a great circuit, but is
"homemade" build quality and
grossly overpriced and over rated.  Foregoing all in my not-so-humble
opinion.  Brgds all, Geo

----- Original Message -----
From: "Joel R. Hallas" <[email protected]>
To: "Richard Peterson" <[email protected]>
Cc: <[email protected]>; <[email protected]>
Sent: Thursday, November 14, 2002 4:42 PM
Subject: [Collins] Re: [Johnson] Re: Advantages/disadvantages of an "L"
tuner circuit?

> And if you build the "T" you avoid the need to switch the input and output
as
> you may with an "L". Not a "showstopper", but another place for loss,
arcing,
> etc.
>
> GL and 73, Joel W1ZR
>
> Richard Peterson wrote:
>
> > The high pass "T" network can handle about the widest impedances I've
ever
> > seen; but on my own unit (for my S-Line or Johsnon Desk), I configure it
> > sometimes for an "L" network which will handle almost as wide a range.
I
> > suppose you could argue that the "T" is something like two back to back
"L"
> > networks.  Regardless, sometimes the configuration can become fairly
High-Q
> > and that's when I encounter some arcing. Summary: The L is a good,
universal
> > circuit, and I would give it a try. However, I have found a little more
> > capability in my "T."  If you have the components, build the "T." -
Richard,
> > WB5NEN
> >
> > From: kwylow zinjanthropus <[email protected]>
> > To: [email protected], [email protected]
> > Subject: [Johnson] Advantages/disadvantages of an "L" tuner circuit?
> > Date: Thu, 14 Nov 2002 10:53:43 -0800 (PST)
> >
> > All:
> >
> > Just took a look at Ten-Tec's lineup. I was surprised that they show
their
> > tuner using an "L" configuration for matching. I was considering
building a
> > 1KW tuner and if TenTec chooses an L designed, I figured "why not". Can
> > anyone convince me either way? Oh, so that the topic is not off subject:
> > it's for my Collins and Johnson rigs
> >
> > 73 de Cal, N6KYR
> >
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